Power Supply - BeaconMedaes TotalAlert 2 Installation, Operation And Maintenance Instructions

Power Supply

Power Supply Assembly:
The power supply assembly converts AC
mains power to +5 and +24 volts DC. AC
mains power can be any value between
100 and 250 VAC. In order to verify power
supply assembly is functioning correctly,
perform following procedure.
1. Loosen two front panel screws and
open alarm panel.
2. If no indicator lights or LED displays are
illuminated on front of alarm panel, first
verify internal fuse is good (Figures 111
and 112). If fuse is good, continue this
procedure.
3. Using a digital volt meter, measure DC
voltage between black (-) and orange
(+) wires where power supply harness
plugs into annunciator module (Figure
26). When making measurements,
do not disconnect cable from
annunciator board. Insert meter
probes into back of white plastic
connector.
4. Verify DC voltage is 4.5 to 5.5 volts.
5. Measure voltage between black (-) and
red (+) wires.
6. Verify DC voltage is 22.0 to 26.0 volts.
WARNING:
RISK OF ELECTRIC SHOCK
The remainder of this procedure requires removal
of the clear plastic power supply shield. Even if
fuse is removed, the high voltage input wiring
remains energized.
7. If voltages above are not within
specification, verify correct AC input
power as follows:
8. Remove four keps nuts and plastic
shield from power supply. Do not
disconnect wires from fuse holder or
harness from power supply.
9. Position plastic shield (wires attached)
so that power supply's AC input
connector is accessible.
10. Using a digital volt meter, measure AC
voltage between white (neutral) and
black (line) wires on back of power
supply connector (Figure 27). Verify AC
input voltage is 100 to 250 volts.
11. If AC input voltage is within
specification, replace power supply
assembly.
Internal fuse holder
Figure 111: Master / Combo Panel Internal Fuse
Internal fuse holder
Figure 112: Area Alarm Panel Internal Fuse
119
6-847718-00 Rev. B00